Sparse construction and reconstruction method of array space signals
A technique for signal sparseness and signal reconstruction, applied to direction finders, instruments, direction finders using radio waves, etc.
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[0053] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0054] Aiming at the problem of low sampling, the present invention establishes a sparsity model of space signals, reconstructs signals by using OPM method, decomposes features of reconstructed signals, and performs Capon beamforming.
[0055] The process of establishing the sparsity model of spatial signal is as follows:
[0056] Suppose X is R N The K-order sparse signal of the space is denoted as {x 1 ,...,x N}, L represents the number of snapshots, where L≥K*log(N / K), Φ is the M×N random observation matrix The observation vector s is s=ΦX.
[0057] ...
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